llvm/lib/ObjCopy/CommonConfig.cpp

   1 //===- CommonConfig.cpp ---------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ObjCopy/CommonConfig.h"
  10
  11 namespace llvm {
  12 namespace objcopy {
  13
  14 Expected<NameOrPattern>
  15 NameOrPattern::create(StringRef Pattern, MatchStyle MS,
  16                       function_ref<Error(Error)> ErrorCallback) {
  17   switch (MS) {
  18   case MatchStyle::Literal:
  19     return NameOrPattern(Pattern);
  20   case MatchStyle::Wildcard: {
  21     SmallVector<char, 32> Data;
  22     bool IsPositiveMatch = true;
  23     if (Pattern[0] == '!') {
  24       IsPositiveMatch = false;
  25       Pattern = Pattern.drop_front();
  26     }
  27     Expected<GlobPattern> GlobOrErr = GlobPattern::create(Pattern);
  28
  29     // If we couldn't create it as a glob, report the error, but try again
  30     // with a literal if the error reporting is non-fatal.
  31     if (!GlobOrErr) {
  32       if (Error E = ErrorCallback(GlobOrErr.takeError()))
  33         return std::move(E);
  34       return create(Pattern, MatchStyle::Literal, ErrorCallback);
  35     }
  36
  37     return NameOrPattern(std::make_shared<GlobPattern>(*GlobOrErr),
  38                          IsPositiveMatch);
  39   }
  40   case MatchStyle::Regex: {
  41     SmallVector<char, 32> Data;
  42     return NameOrPattern(std::make_shared<Regex>(
  43         ("^" + Pattern.ltrim('^').rtrim('$') + "$").toStringRef(Data)));
  44   }
  45   }
  46   llvm_unreachable("Unhandled llvm.objcopy.MatchStyle enum");
  47 }
  48
  49 } // end namespace objcopy
  50 } // end namespace llvm